1,2-Diaminocyclohexane Properties: Density, Molecular Weight, Boiling & Melting Point
📊 Verified physical & chemical data for CAS 694-83-7
Whether you are formulating an epoxy system, designing a chiral catalyst, or qualifying a new supplier, the physical and chemical properties of 1,2-diaminocyclohexane (DACH) determine how the material behaves in your process. This guide gathers the most-searched property questions - density, molecular weight, molar mass, boiling point, melting point, solubility, and more - into one verified reference for CAS 694-83-7. ✅
New to the molecule? Start with our overview, What Is 1,2-Diaminocyclohexane (DACH)? Then use the data tables below as your quick-reference spec sheet.
📋 1,2-Diaminocyclohexane Property Summary
| Property | Value |
| Molecular formula | C₆H₁₄N₂ |
| Molar mass / molecular weight | 114.19 g/mol |
| Density (trans, ~20 °C) | ~0.95 g/cm³ (≈0.951 g/mL) |
| Boiling point | ~79–81 °C at 15 mmHg (reduced pressure) |
| Melting point (trans) | ~14–15 °C |
| Flash point | ~69 °C |
| Refractive index (n²⁰/D) | ~1.49 |
| Appearance | Colorless to pale-yellow liquid |
| Solubility | Miscible with water; soluble in alcohols & polar solvents |
💡 Values are typical literature/commercial figures for orientation. Always rely on the supplier's batch COA for the isomer and grade you purchase.
⚖️ Molecular Weight, Molar Mass, MW, Mr & Formula Weight
These terms all describe the same number for 1,2-diaminocyclohexane. With the formula C₆H₁₄N₂, the molar mass (also written MW, Mr, or formula weight) is 114.19 g/mol. The breakdown is straightforward: six carbons (≈72.06), fourteen hydrogens (≈14.11), and two nitrogens (≈28.01), summing to ≈114.19 g/mol. 🧮
This value is identical for every isomer - cis, trans, and the single enantiomers - because they share the same molecular formula and differ only in spatial arrangement. For why those arrangements matter, see cis vs trans 1,2-diaminocyclohexane isomers.
💧 Density of 1,2-Diaminocyclohexane
The density of 1,2-diaminocyclohexane is approximately 0.95 g/cm³ (≈0.951 g/mL) at room temperature for the trans form. Because DACH is a liquid that is slightly less dense than water, it factors directly into volume-to-weight conversions when you dose it as an epoxy hardener or charge a reactor. ⚗️
A practical tip: when a formulation calls for a mass of DACH, divide by ~0.95 to estimate the volume, but always confirm against the COA density, since trace water and isomer ratio shift the figure slightly.
🌡️ Boiling Point & Melting Point
The boiling point of trans-1,2-diaminocyclohexane is commonly reported as ~79–81 °C at 15 mmHg - that is, under reduced pressure, which is how amines like this are typically distilled to avoid thermal degradation. The melting point of the trans isomer sits near 14–15 °C, meaning the material can solidify in a cool warehouse and should be conditioned to a liquid before dispensing. 🌡️
The flash point (~69 °C) is relevant for storage and transport classification. For complete hazard and handling data, see our DACH hazards & SDS guide.
🧪 Solubility & Basicity
✅ Water: Fully miscible - the two amine groups make DACH strongly hydrophilic.
✅ Organic solvents: Soluble in alcohols, ethers, and most polar organics.
✅ Basicity: A strong diamine base; it neutralizes acids exothermically and reacts readily with epoxides, anhydrides, and aldehydes.
This high reactivity is precisely what makes DACH effective as an epoxy curing agent and a ligand precursor - explored in DACH as an epoxy curing agent and in its structure, formula & NMR guide.
📄 Need the Full Specification & COA?
Sinolook Chemical provides complete technical specifications, batch COA, and SDS for 1,2-diaminocyclohexane (CAS 694-83-7), with export-ready packaging to 50+ countries.
👉 View DACH Product & Technical Specifications❓ Frequently Asked Questions
🔹 What is the molecular weight of 1,2-diaminocyclohexane?
The molecular weight (molar mass / Mr / formula weight) is 114.19 g/mol, based on the formula C₆H₁₄N₂. This is the same for all isomers.
🔹 What is the density of 1,2-diaminocyclohexane?
It is approximately 0.95 g/cm³ (≈0.951 g/mL) at room temperature for the trans form - slightly less dense than water.
🔹 What is the boiling point of trans-1,2-diaminocyclohexane?
Around 79–81 °C at 15 mmHg (reduced pressure), the conditions typically used for vacuum distillation of the amine.
🔹 Is 1,2-diaminocyclohexane soluble in water?
Yes - it is fully miscible with water and also dissolves in alcohols and most polar organic solvents.
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